/* let obj = { username: "wangwu", age: 23 };
const username = "username";
let u = obj["username"];

let u1 = obj[username]; */

let obj: object = { username: "wangwu", age: 23 };
const username = "username";
// object类中没有username属性
// let u = obj["username"];
// let u1 = obj[username];

export {};
